胸大無腦

(having) big boobs but no brain / bimbo

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

variant of 胸[xiong1]

chest / bosom / heart / mind / thorax

not to have / no / none / not / to lack / un- / -less

brain / mind / head / essence